Small-caliber laser resection mirror

Abstract

The utility model relates to a small-caliber laser resection mirror. The small-caliber laser resection mirror comprises an inner sheath, an endoscope, an optical fiber pipeline, an operator and a connector. The endoscope and the optical fiber pipeline are arranged in the inner sheath in a penetrating manner; the operator is arranged at one end of the inner sheath and used for controlling the optical fiber pipeline to stretch out and draw back in the inner sheath. The end, away from the operator, of the inner sheath is closed, and a backflow hole is formed in the side wall of the end, away from the operator, of the inner sheath. According to the small-caliber laser resection mirror, the overall design thought is changed, the brand-new laser resection mirror structure which can keep the original function of the resection mirror unchanged and reduce the caliber is provided, an outer sheath is innovatively removed, the optical fiber channel is combined with the water injection function, and the optical fiber channel is combined with the water injection function. Meanwhile, the inner sheath serves as the outermost layer of the whole novel resection mirror structure, the interior of the inner sheath is used for draining water, so that a stable water inlet and outlet system is constructed, and finally the caliber of the laser resection mirror stretching into the urethra can reach Fr18-Fr24.

Description

TECHNICAL FIELD

[0001] The utility model relates to laser resection mirror technical field, in particular to a small caliber laser resection mirror. BACKGROUND

[0002] The prostate hyperplasia operation is mainly realized through the transurethral prostate laser resection mirror, and the standard caliber transurethral prostate laser resection mirror on the market is Fr26, which is not completely suitable for the characteristics of the urethra of part of Chinese people being thin. The composition part of the transurethral prostate laser resection mirror generally includes an inner sheath, an outer sheath, a endoscope, an operator, a obturator and the like. Up to now, there are Fr24, even Fr20 small caliber prostate laser resection mirrors on the market. However, there are still some unsolved problems: ①the operation insertion problem of part of patients with thin urethra, urethral stenosis or pediatric urethra still cannot be solved; ②the main structure of the traditional resection mirror does not change, and only the precision and sheath thickness are reduced to achieve the purpose of reducing the caliber. With the caliber becoming thin, the caliber of the inner and outer sheaths and the matching ocular lens of the laser resection mirror also needs to be correspondingly reduced, so that the overall support force and strength of the laser resection mirror are reduced, and the laser resection mirror is easy to deform or even break. SUMMARY

[0003] Therefore, it is necessary to provide a small caliber laser resection mirror in view of the problems that the caliber of the existing transurethral prostate laser resection mirror is difficult to reduce, and the strength of the resection mirror is reduced when the caliber is reduced.

[0004] A small caliber laser resection mirror, which comprises an inner sheath, a endoscope, a optical fiber pipeline, an operator and a joint; the endoscope and the optical fiber pipeline are arranged in the inner sheath; the operator is arranged at one end of the inner sheath and is used for controlling the optical fiber pipeline to stretch out and retract in the inner sheath;

[0005] One end of the inner sheath away from the operator is closed, and a backflow hole is arranged on the side wall of the one end of the inner sheath away from the operator;

[0006] The optical fiber pipeline is used for arranging optical fibers and is also used for injecting water when in use;

[0007] The joint is arranged at one end of the optical fiber pipeline close to the operator; the joint comprises two inlets connected with the optical fiber pipeline; one of the inlets is used for arranging optical fibers in the optical fiber pipeline, and the other inlet is used for injecting water into the optical fiber pipeline.

[0008] As a preferred example, the joint comprises a tee, a hose and a lock; one end of the tee is connected with the optical fiber pipeline; the other end of the tee is used for connecting with an external water source; the remaining end of the tee is connected with the hose; the hose is used for arranging optical fibers in the optical fiber pipeline; the lock is arranged on the tee and is used for applying a force to the hose in the direction of the optical fiber, so that the hose and the optical fiber are sealed.

[0009] As a preferred example, the locking device comprises:

[0010] an insert, which is sleeved on the hose; one end of the insert is provided with a bevel;

[0011] two threaded collars; one of the collars is fixedly sleeved on the tee pipe, and the other collar is sleeved on the insert, and the inner wall of the collar abuts against the bevel on the insert; when the two collars are close to or away from each other, the collars extrude the bevel to deform the insert towards the hose, so that the hose and the optical fiber are sealed.

[0012] As a preferred example, the hose and the optical fiber pipe are coaxially arranged.

[0013] As a preferred example, the tee pipe is provided with a valve for controlling the on-off of an external water source.

[0014] As a preferred example, the tee pipe is detachably connected with the optical fiber pipe.

[0015] As a preferred example, the joint comprises a tee pipe; one end of the tee pipe is communicated with the optical fiber pipe; the other end of the tee pipe is used for communicating with an external water source; and the remaining end of the tee pipe is used for threading the optical fiber into the optical fiber pipe.

[0016] As a preferred example, the plurality of backflow holes are uniformly distributed on the inner sheath in a circumferential direction.

[0017] As a preferred example, the water injection into the optical fiber pipe adopts a pressurized water injection mode.

[0018] A use method of a small-caliber laser resectoscope, which uses the small-caliber laser resectoscope as described above; the use method comprises the following steps:

[0019] The external flushing water enters the human body through the joint and the optical fiber pipe; and the flushing water in the human body is discharged from the human body through the backflow hole and the inner sheath, so as to form a dynamic circulation of the flushing water.

[0020] The use method has the following beneficial effects:

[0021] 1. The small-caliber laser resectoscope changes the overall design idea, proposes a brand-new laser resectoscope structure which can keep the original function of the resectoscope unchanged and reduce the caliber, removes the outer sheath innovatively, combines the optical fiber channel and the water injection function, takes the inner sheath as the outermost layer of the new resectoscope structure, and uses the inner part of the inner sheath for drainage, so as to construct a stable water inlet and outlet system, further reduce the caliber of the resectoscope, and finally make the caliber of the laser resectoscope inserted into the urethra reach Fr18-Fr24, so that the required small caliber is realized.

[0022] 2、The laser ablation mirror provided by the utility model can be composed of original components with sufficient supporting force and strength through the improvement of the novel structure, instead of reducing the aperture by reducing the thickness and diameter of the components, so that the diameter of the laser ablation mirror can be reduced while the mirror body still has sufficient supporting force and strength and is not prone to deformation and fracture. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 Part structure schematic diagram of the front end of the inner sheath in the embodiment;

[0024] Figure 2 Structure schematic diagram of the connection of the operator with the inner sheath and the joint;

[0025] Figure 3 Structure schematic diagram of the locking device.

[0026] In the figure: inner sheath 1, endoscope 2, optical fiber pipeline 3, operator 4, joint 5, tee pipe 6, hose 7, insert 8, collar 9. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0028] It should be noted that when a component is referred to as "mounted on" another component, it can be directly on the other component or there can be a middle component. When a component is referred to as "disposed on" another component, it can be directly disposed on the other component or there can be a middle component. When a component is referred to as "fixed on" another component, it can be directly fixed on the other component or there can be a middle component.

[0029] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0031] This embodiment provides a small-aperture laser resection endoscope, the main body of which includes only an inner sheath 1, an endoscope 2, a fiber optic tube 3, a manipulator 4, and a connector 5. Obviously, compared to traditional resection endoscopes, this small-aperture laser resection endoscope first eliminates the outer sheath design, which can reduce the resection endoscope diameter by at least 2 Fr units. Wherein, as... Figure 1 As shown, the inner sheath 1 can be made of materials such as stainless steel or titanium alloy, ensuring its strength while maintaining good biocompatibility. The inner sheath 1 is designed as a rigid tube, with one end closed, serving as the end that extends into the human body. Multiple reflux holes are formed on the side wall of this closed end. These reflux holes are evenly distributed circumferentially on the inner sheath 1 to increase the water inflow rate. A corresponding reflux interface and valve are provided at the end of the inner sheath 1 furthest from the reflux holes to drain the water flowing back into the inner sheath 1. The endoscope 2 and the fiber optic tube 3 are both inserted inside the inner sheath 1. The manipulator 4 is located at the end of the inner sheath 1 furthest from the reflux holes; that is, during surgery, the manipulator 4 is at the end of the inner sheath 1 outside the human body, and it is used to control the extension and retraction of the fiber optic tube 3 inside the inner sheath 1. As is well known to those skilled in the art, the endoscope 2 is a commonly used component in resection endoscopes. Endoscope 2 is used to observe lesions and monitor surgery. It can be a conventional medical endoscope 2. According to the imaging structure, it can be divided into rigid endoscope, optical fiber (flexible type 7) endoscope and electronic endoscope, etc.

[0032] like Figure 2The operator 4 includes a connecting tube, a handle, a slider, a reset assembly and the like. The connecting tube is inserted into the inner sheath 1, so that the operator 4 is connected with the inner sheath 1, and the endoscope 2 is arranged in the connecting tube and enters the inner sheath 1. The slider is arranged outside the connecting tube, and the slider is fixed with the optical fiber channel 3. The handle is connected with the slider, and is used to drive the slider to slide on the connecting tube. The reset assembly generally includes a spring. Through the elasticity of the spring and the pressing of the handle by the operator, the slider can reciprocate, so as to drive the optical fiber channel 3 to extend and retract in the inner sheath 1, and realize laser ablation of the lesion. In the prior art, the function of the optical fiber channel 3 is only to pass the optical fiber. One end of the optical fiber is connected with a light source, and the other end extends to the end of the optical fiber channel 3 in the human body, and transmits laser energy through the optical fiber. The circulating water system is necessary for the laser ablation mirror, and is an important factor for limiting the aperture of the ablation mirror. In the existing design of the laser ablation mirror, water injection is through the inner space of the inner sheath, and water drainage is through the space between the inner sheath and the outer sheath, which is a mature scheme and has been used for a long time. The scheme creatively combines the optical fiber channel with the water injection function to replace the water injection channel of the traditional ablation mirror. The optical fiber channel injects water and the inner space of the inner sheath returns water, so as to form a complete water circulation, break through the thinking inertia of the traditional ablation mirror design (that is, simply reducing the aperture by reducing the precision and the thickness of the sheath), and can reduce the aperture of the laser ablation mirror (the aperture of the laser ablation mirror can reach Fr18~Fr24), without reducing the original function, while the ablation mirror still has strong support and strength.

[0033] Specifically, the structure design of the optical fiber channel combined with the water injection function in the embodiment is as follows Figure 3The special designed joint 5 is arranged at the end of the optical fiber conduit 3 close to the operator 4. The joint 5 comprises a tee pipe 6, a hose 7 and a lock. One end of the tee pipe 6 is communicated with the optical fiber conduit 3. In this embodiment, the tee pipe 6 is detachably connected with the end of the optical fiber conduit 3, and the detachable connection is generally achieved by screwing. The other end of the tee pipe 6 is used to communicate with the external water source. A valve can be installed on the end connected with the external water source, which is used to control the opening and closing of the water inlet. It is worth mentioning that, in order to ensure sufficient water inflow, the diameter of the optical fiber conduit 3 in this design can be appropriately enlarged compared with the existing optical fiber conduit 3. The diameter of the optical fiber conduit 3 is much smaller than that of the inner sheath 1, which is generally about Fr2~Fr6. The inner space of the inner sheath 1 itself has a proper surplus. Because the optical fiber conduit 3 can be appropriately enlarged to meet the water inflow requirement, the appropriately enlarged optical fiber conduit 3 will not affect the size of the entire laser ablation mirror in this scheme. In another design, the external water source can also be a pressurized water source. The pressurized water is injected into the human body through the joint 5 and the optical fiber conduit 3, thereby ensuring sufficient water inflow. The above two methods can be used alone or in combination. The ultimate goal is to ensure sufficient water inflow during the operation. The remaining end of the tee pipe 6 is communicated with the hose 7. The optical fiber is generally inserted into the optical fiber conduit 3 before the operation. In order to ensure the smooth installation of the optical fiber, the hose 7 is preferably arranged coaxially with the optical fiber conduit 3. In order to avoid the water injected into the optical fiber conduit 3 from flowing out of the rear end of the optical fiber conduit 3 (i.e. the end close to the operator 4), the lock needs to be used in cooperation with the hose 7. In this embodiment, the lock comprises an insert 8 and two threadedly connected collars 9. The insert 8 is annular and is sleeved on the hose 7, and a bevel is arranged on one end of the outer side wall of the insert 8. The insert 8 itself has a certain elasticity, and a slot is formed in the annular insert 8, so that the insert 8 can be deformed more easily. One of the collars 9 is fixedly sleeved on the tee pipe 6, and the other collar 9 is sleeved on the insert 8, and the inner wall thereof abuts against the bevel on the insert 8. When the collar 9 sleeved on the insert 8 is rotated, the two collars 9 are away from or close to each other due to the thread effect, so that the inner wall of the collar 9 extrudes the bevel on the insert 8, thereby deforming the insert 8 towards the hose 7. The deformation of the insert 8 extrudes the hose 7, so that the hose 7 is tightly sealed with the periphery of the optical fiber, thereby preventing the water from flowing out of the rear side of the optical fiber conduit 3. This design can not only solve the problem of water flowing out of the rear side of the optical fiber conduit 3, but also fix the optical fiber in the optical fiber conduit 3. Specifically, the operator 4 is used to reciprocatingly drive the optical fiber conduit 3 to stretch and retract in the inner sheath 1, and the optical fiber conduit 3 in this scheme needs to inject water at the same time. Thus, in the process of repeated movement of the optical fiber conduit 3, the optical fiber in the optical fiber conduit 3 may slide relative to the optical fiber conduit 3, which affects the laser ablation of the front end of the optical fiber conduit 3.The locking device designed in the embodiment can lock or clamp the optical fiber in the end of the optical fiber conduit 3 through the hose 7, so as to prevent the optical fiber from slipping relative to the optical fiber conduit 3.

[0034] In another embodiment, compared with the above-mentioned embodiment, the joint 5 can be directly provided as a tee pipe 6. One end of the tee pipe 6 is communicated with the optical fiber conduit 3, the other end is used for communicating with an external water source, and the remaining end is used for threading the optical fiber into the optical fiber conduit 3. Such a design can reduce the structural design of the rear end of the optical fiber conduit 3 and facilitate operation. As for the water leakage problem of the rear end of the optical fiber conduit 3, sealing methods such as wrapping the optical fiber and the optical fiber conduit 3 with sealing tape, filling sealing material between the optical fiber and the optical fiber conduit 3, etc. can be used, which are not listed here.

[0035] In summary, the traditional laser resectoscope only reduces the total diameter by reducing the thickness and diameter of the components. The total diameter is limited, and the overall support of the resectoscope is easily reduced, which is prone to deformation and even breakage, and has limitations. The small-diameter laser resectoscope proposed by the utility model changes the overall design idea and proposes a new laser resectoscope structure that can maintain the original function of the resectoscope and reduce the diameter. The outer sheath is removed, the inner sheath 1 is used as the outermost layer of the new laser resectoscope structure, the original optical fiber conduit is used to form a water injection channel, and the gap between the inner sheath 1 and the optical fiber conduit 3 is used to form a drainage conduit, thereby constructing a stable water inlet and outlet system, so that the resectoscope inserted into the urethra has a diameter of Fr18-Fr24, thereby achieving the required small diameter. The laser resectoscope proposed by the utility model improves the new structure, and can select existing components on the market that have sufficient support and strength, rather than reducing the diameter by reducing the thickness and diameter of the components based on the existing laser resectoscope structure, thereby reducing the diameter of the laser resectoscope while ensuring that the mirror body has sufficient support and strength and is not prone to deformation and breakage.

[0036] In another embodiment, a method for using the small-diameter laser resectoscope is also proposed, which uses the small-diameter laser resectoscope as described above. The method comprises the following steps:

[0037] The external flushing water enters the human body through the joint 5 and the optical fiber conduit 3. The flushing water in the human body is discharged from the human body through the return hole and the inner sheath 1, thereby forming a dynamic circulation of the flushing water.

[0038] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present disclosure.

[0039] The above-described embodiments only express several implementation manners of the utility model, the description is more specific and detailed, but can not therefore be understood as the limitation of the utility model patent range. It should be pointed out that for ordinary skilled person in the art, without departing from the utility model concept, several modifications and improvements can be made, which belong to the protection range of the utility model. Therefore, the protection range of the utility model patent should be subject to the appended claims.

Claims

1. A small-bore laser resectoscope, characterized by, It includes inner sheath (1), endoscope (2), optical fiber pipe (3), operator (4) and joint (5); the endoscope (2) and optical fiber pipe (3) are both arranged in the inner sheath (1); the operator (4) is arranged at one end of the inner sheath (1), which is used to control the optical fiber pipe (3) to stretch out or retract in the inner sheath (1); The one end of the inner sheath (1) away from the operator (4) is closed, and the side wall of the one end of the inner sheath (1) away from the operator (4) is provided with a backflow hole; The optical fiber pipe (3) is used to arrange optical fiber, and also used to inject water in the using process. The joint (5) is arranged at one end of the optical fiber pipe (3) close to the operator (4); the joint (5) includes two inlets which are both communicated with the optical fiber pipe (3); one of the inlets is used to arrange optical fiber in the optical fiber pipe (3), and the other inlet is used to inject water in the optical fiber pipe (3).

2. The small-bore laser ablation scope of claim 1, wherein, The joint (5) includes a tee (6), a hose (7) and a lock; one end of the tee (6) is communicated with the optical fiber pipe (3); the other end of the tee (6) is used to communicate with external water source; the remaining end of the tee (6) is communicated with the hose (7); the hose (7) is used to arrange optical fiber in the optical fiber pipe (3); the lock is arranged on the tee (6), which is used to apply force to the hose (7) in the direction of the optical fiber, so that the hose (7) and the optical fiber are sealed.

3. The small-bore laser ablation scope of claim 2, wherein, The lock includes: An insert (8) is sleeved on the hose (7); one end of the insert (8) is provided with an inclined surface; Two threaded sleeves (9) are sleeved on the tee (6) and the insert (8); when the two sleeves (9) are close to or away from each other, the sleeve (9) extrudes the inclined surface to deform the insert (8) in the direction of the hose (7), so that the hose (7) and the optical fiber are sealed.

4. The small-bore laser ablation scope of claim 2, wherein, The hose (7) and the optical fiber pipe (3) are coaxially arranged.

5. The small-bore laser ablation scope of claim 2, wherein, A valve is arranged on the tee (6) to control the opening and closing of the external water source.

6. The small-bore laser ablation scope of claim 2, wherein, The tee (6) and the optical fiber pipe (3) are detachably connected.

7. The small-bore laser ablation scope of claim 1, wherein, The joint (5) includes a tee (6); one end of the tee (6) is communicated with the optical fiber pipe (3); the other end of the tee (6) is used to communicate with external water source; the remaining end of the tee (6) is used to arrange optical fiber in the optical fiber pipe (3).

8. The small-bore laser ablation scope of claim 1, wherein, The backflow holes are circumferentially and uniformly distributed on the inner sheath (1).

9. The small-bore laser ablation scope of claim 1, wherein, The water injection into the optical fiber pipe (3) adopts the pressurized water injection mode.

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